Programming speedometer
| Programming speedometer |
The ABS or TC/ABS control module reads 29 pulses per wheel revolution. Depending on the dimensions of the tyre and rim (physical circumference), one kilometre will correspond to a different number of pulses when the main instrument unit receives the value from ABS or TC/ABS. It is therefore possible to change how the main instrument unit interprets the total number of pulses per kilometre so they correspond to the tyre dimension fitted on the car. Programming must be carried out so that the speedometer and odometer can give the driver the correct information. On certain markets, it is a legal requirement that the speed the speedometer shows is between 0 and 10 km/h too high.
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If the speedometer is not programmed correctly, the speed that is displayed to the driver may be lower than the actual speed and SID will provide incorrect information on the fuel quantity and time of arrival. |
If the speedometer is programmed for a certain tyre and new wheels with larger circumference are fitted, the speed indicated by the speedometer will be too low.
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